Question: What is the think tank for the Smithsonian Institution's parent organization?
Paraphrase: What is the research organization for the Smithsonian Institution's parent association?
SPARQL (Wikidata):  select distinct ?sbj where { ?sbj wdt:P749 wd:Q131626 . ?sbj wdt:P31 wd:Q155271 } 
Answer: Woodrow Wilson International Center for Scholars